Volume 2, Issue 4 (English 2013)                   JEM 2013, 2(4): 40-47 | Back to browse issues page

XML Persian Abstract Print

Download citation:
BibTeX | RIS | EndNote | Medlars | ProCite | Reference Manager | RefWorks
Send citation to:

Iranmanesh A, mehrabian M. Transient Characteristics of a Single-Effect Absorption Refrigeration Cycle. JEM 2013; 2 (4) :40-47
URL: http://energy.kashanu.ac.ir/article-1-79-en.html
Shahid Bahonar
Abstract:   (10424 Views)
This paper deals with a lumped-parameter dynamic simulation of a single-effect LiBr-H2O absorption chiller. In many studies the thermodynamic properties of LiBr-H2O solution were taken from some approximate relations causing the results to be somewhat inaccurate. These relations were used to solve simultaneous differential equations involving the continuity of species constituting the LiBr-H2O solution, momentum equations, and energy balances. To diminish the effect of these approximate relations on the results, in this study the thermodynamic properties were taken from the EES software. By making a link between EES and MATLAB softwares, the simultaneous differential equations were solved in MATLAB environment and this process was continued until the convergence criterion was satisfied. Moreover, this study considers the effect of quality on the concentration of solution at the exits of generator and absorber. This effect was ignored in the previous works. In other words, the concentrations of solution at the generator and absorber were not assumed to be equal to the corresponding concentration at the exit of those components in this model. Furthermore, a transient analysis of exergy is accomplished. As time passes, both the coefficient of performance and exergetic efficiency decrease, approaching the steady-state values. The results deduced from the dynamic simulation are compared with those in steady-state condition. The comparison shows that the transient simulation predictions are in close agreement with steady-state results.
Full-Text [PDF 787 kb]   (4630 Downloads)    
Type of Study: Research | Subject: Mechanical Engineering
Received: 2012/12/9 | Revised: 2013/08/7 | Accepted: 2013/08/7 | Published: 2013/08/7

Add your comments about this article : Your username or Email:

Rights and permissions
  This work is licensed under a This work is licensed under a Creative Common International License..

© 2023 CC BY-NC 4.0 | Energy Engineering & Management

Designed & Developed by : Yektaweb